Table 2

Comparison of genotyping results and allele frequencies of the Duffy Blood Group System among blood donors and patients infected with P. vivax from Brazilian Amazon region.

Duffy blood group system

Brazilian Amazon Region

Genotypes

Predicted Phenotype

Donors (n = 330)

Patients P. vivax (n = 312)

P

FYA/FYA

Fy(a⁺b^-)

43

51

0,2644

FYA/FY^X

Fy(a⁺b^-)

3

5

0,4942

FYA/FYB-33

Fy(a⁺b^-)

62

34

0,0055*

FYA/FYB

Fy(a⁺b⁺)

90

109

0,0404*

FYB/FYB

Fy(a^-b⁺)

54

63

0,2208

FYB/FY^X

Fy(a^-b⁺)

6

4

0,7530

FY^X/FY^X

Fy(a^-b^-)

-

2

0,2358

FYB/FYB-33

Fy(a^-b⁺)

54

42

0,3205

FYB-33/FYB-33

Fy(a^-b^-)

18

2

0,0003*

Alelles

Alelles Frequencies

FYA

0,365

0,400

0,2896

FYB

0,390

0,450

0,0351

FY^X

0,014

0,021

0,5726

FYB-33

0,230

0,128

0,0000

* Fisher's Exact Test.

Cavasini et al. Malaria Journal 2007 6:167   doi:10.1186/1475-2875-6-167